TADANO LTD.

The present invention provides a guide display device capable of recognizing a feature in a work area while distinguishing whether the feature is a moving body or not. In a guide display device of a crane, 3D maps are created for continuous frames; an altitude value for each grid in a 3D map that is created at time closest to the current time is obtained as a first altitude value; altitude values for respective corresponding grids in a predetermined number of 3D maps other than the 3D map that is created at time closest to the current time are obtained, and the average of the altitude values is calculated as a second altitude value; and it is determined that the feature is a moving body when the difference between the first altitude value and the second altitude value exceeds a predetermined threshold.

An operation assistance module operates in coordination with an operation control unit that controls the actions of a work machine, or with an operation control unit of an image generation application that controls the actions of an image of the work machine displayed on a display unit, wherein the operation assistance module has: a request issuance unit that transmits, to a performance information server, a request including machine type information for a work machine and a performance information request to indicate performance information for the work machine; a response acquisition unit that receives from the performance information server a response including the requested performance information; and an operation assistance unit that reflects the acquired performance information in the control of the operation control unit.

A maneuvering assistance system according to the present invention assists maneuvering of a work vehicle including a boom, said maneuvering assistance system comprising: a display that is transparent and that is capable of displaying an image; a generation unit that generates a virtual image indicating a target member including the boom and/or a member that moves together with the boom; and a control unit that displays the virtual image on the display in a superimposed manner on a landscape visible through the display in a mode in which a user of the display is capable of recognizing a position of the target member.

This crane is provided with a counterweight which includes an engaging part, a swivel body which is configured to be capable of swiveling, and a fixing unit which is provided on the swivel body, includes an engaged part that can connect with the engaging part, and can adopt a front position and a rear position; in each of the front position and the rear position, the fixing unit and the counterweight are linked by the engaged part being arranged in a position corresponding to that of the engaging part and being connected to the engaging part.

The present invention provides a dynamic lift-off control device and a crane with which it is possible to quickly perform dynamic lift-off of a suspended load while suppressing vibration of the load. This dynamic lift-off control device D comprises: a boom ( 14 ); a winch ( 13 ); a load weight measurement means ( 22 ); and a controller ( 40 ) serving as a control unit, the controller ( 40 ) controlling operations of the boom ( 14 ) and the winch ( 13 ), deriving, when performing dynamic lift-off of the suspended load by hoisting the winch ( 13 ), an amount of change in a derricking angle of the boom ( 14 ) on the basis of the time change in the measured load weight, and raising the boom ( 14 ) so as to compensate for the amount of change.

Provided is a controller with high versatility that can automatically store or raise a boom and can be commonly used for various boom devices. The controller generates a function based on a length of a boom and a distance from a derrick fulcrum of the boom to an engaging member stored in a memory, and a depression angle of the engaging member with respect to the fulcrum. Then, the controller substitutes a derrick angle of the boom detected by a derrick angle sensor into the generated function to calculate a displacement distance from a distal end of the boom to the engaging member. The controller rotates a winch while raising and lowering the boom between a lowered position and a raised position such that the calculated displacement distance is a distance corresponding to an unwinding length of a wire detected by a length sensor.

An image system is for a crane in which a boom that can be raised and lowered is provided to a vehicle with a rotating base therebetween, and said image system is provided with a plurality of vehicle body cameras provided to the vehicle, an upper camera provided to the boom, a display device, and an image processing device. The image processing device acquires vicinity images of the crane captured by the vehicle body cameras and an upper image of the crane captured by the upper camera, converts the vicinity images into images looking downward from an overhead virtual viewpoint, connects the results, generates a bird's-eye-view image, and uses the display device to display a composite image in which a supplementary image of the upper image corresponding to a missing part in the bird's-eye-view image is superimposed on the missing part.

This work machine comprises: a first pin transitioning between an in-state where the boom and the telescopic cylinder are connected and an out-state where the connection is released; a second pin transitioning between an in state where booms are connected and an out-state where the connection is released; a main-detection device and a sub-detection device detecting the states of the first pin and the second pin; and a control unit that controls the boom based on the detection results of the main-detection device. The control unit controls the ON/OFF of a first flag indicating whether or not the main-detection device detected the combination and the ON/OFF of a second flag indicating whether or not the sub-detection device detected the combination, and detects that an abnormality has occurred in the main-detection device and sub-detection device based on the first flag and the second flag.

A crane device is capable of setting multiple types of number of rope falls between a tip of a boom and a hook block, and includes: a feed length detection unit that detects a feed length of a rope fed from a winch on which the rope is wound; a boom angle detection unit that detects a boom hoist angle; and a number-of-falls determination unit that calculates information for determining the suitability of the number of falls for the rope on the basis of the feed length, hoist angle, boom length of the boom in a state of hoisting a grounded load.

There is provided a crane control method whereby, during automatic transportation of a load along a preset transport route using a crane, it is possible to reliably transport the load along the route; and a crane that can be controlled by the crane control method. A control device ( 32 ) calculates target speed signals (VU), (VW), (VR) for designating the target hoisting speed and the target rotational speed of a boom ( 9 ) and the target winding/unwinding speed of main wire rope ( 14 ) or sub wire rope ( 16 ), calculates the maximum speeds (VUmax), (VWmax), (VRmax) of the hoisting and rotation of the boom ( 9 ) and winding/unwinding of the main wire rope ( 14 ) or the sub wire rope ( 16 ), and, if a target speed exceeds the corresponding maximum speed, controls the crane ( 1 ) by multiplying the target speed signal (VU), (VW), (VR) by a coefficient and restricting the target speed signal (VU), (VW), (VR) to be less than the corresponding maximum speed.